Engines and Components› Pistons and Piston Rings

JE Pistons

BBC NITROUS DOME GP

$1,281.66

SKU: J001 312686

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
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Description

JE Pistons Nitrous Series pistons designed for nitrous featuring, vertical and lateral gas ports have been incorporated to optimize top ring seal and reduce friction. Ring grooves are machined to accept JE Pro Seal series J860 "HNS" Hardened Nitrous Series rings with .043 back-cut top ring, 1/16 taper face second ring, and 3/16 oil ring. Compression height figured using 9.780" deck height with zero deck clearance. Fits most open chamber cylinder heads. Part Number 258199 is designed for a decked block. Includes: Pin #990-2930-18-51S (174g), Double spiro locks (#990-042-CS), Vertical and Lateral gas ports, Contact reduction grooves. Compression Ratio: 110cc 13.6:1, 118cc 12.6:1, 124cc 11.9:1. Note: *Oil rail supports included. Made to order.*

Fitment

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Specifications

BrandJE Pistons
Part NumberJ001 312686

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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